I need to run cables along a wall that is defined by a spline; however, I want
the cables to sag between the clips that hold them to the walls. How can I do
this?

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HelveticaFanatic wrote:
> I need to run cables along a wall that is defined by a spline; however, I want
> the cables to sag between the clips that hold them to the walls. How can I do
> this?
> 
> 

The equation you want to generate the cable trajectories is:
http://en.wikipedia.org/wiki/Catenary

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>I need to run cables along a wall that is defined by a spline; however, I 
>want
> the cables to sag between the clips that hold them to the walls. How can I 
> do
> this?
If you have a spline for the wall, then you can create
a spline for the cable using just the x and z components
of the wall spline, and provide your own y components.

#macro combineSpline (wallSpline, heightSpline)
   #local cable = spline { natural_spline,
   #local c = 0;
   #while (c<=1)
      c,<wallSpline(c).x,heightSpline(c).y,wallSpline(c).z>
      #local c=c+0.01
   #end
   };
   (cable)
#end

#declare CableSpline = combineSpline(wallSpline, heightSpline);

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